Improved shaft-coupling



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HIRAM DODGE, OF BEAVER'DAM,` WISCONSIN Lette/rs Fermn/0. 95,888, (laterzoctober 19, 1869.

w.. IMPRovED sArT-COUPLING.

*wwf- The Schedule referred to in these Letters Patent-and making partof the same.

To all whom it may concern:

Be it known that I, HIRAM DODGE, of Beaver Dam, in the county of Dodge,and State of Wisconsin, have invented a new and useful Improvement inShaft-0ouplings; and I do hereby declare that the following is a full,clear, and exact description thereof, which will enable those skilled inthe art to make and 'use the same, reference beinghad to the accompany--Figure 5, a section of a part appertaining to fig. 2, showing how thefriction-rollers are held in place.

The present invention relates to an improvement in that class ofcouplings which is designed to connect shafts which are to run out ofline, and its nature will be fully understood by the following referenceto its detailed construction. y

D represents one end of a shaft which is made to rotate in a metal head,and which is held in place by a nut, M.

The end of the head A is provided with a series of arms, E, whichinterlock friction-rollers H, iigs. 2 and 5, and with a screw-thread, K,which holds a shell, or case B in place, as shown at iig. 1, said shellhaving a screw-thread cut on its inner periphery for this purpose.

The inner end of the head A is recessed out deep enough, below theshoulders h of the arms E, to receive a nut, M, without interfering withthe rollers H. And on the linternal. periphery of the recess is formed aratchet, fff, iig. 4, which is used in combination with pawls J, torotate the head A, D in this case being the drive-shaft.

The pawls J are pivoted' to the nut M, iig. 4, and

in the present construction are held to the ratchet by the motion of theshaft D. Springs, however, may be placed between them and the nut, whenthe machinery to be operated will admit of no lost motion.

A cylindrical head, F, fig. 2, is fastened to the shaft C, and providedwith a series of short arms, I, corre'- sponding in number to the numberof arms E, on which friction-rollers H are placed, to relieve the partsfrom fliction.

The shaft O passes through a large opening, L, in the end of the shellB, which is so made as to x the -greatest angle on which the two shaftsare to run out of line.

By means of this construction and arrangement, a coupling is provided,which is very strong and durable, and also free from any liability ofcatching the clothes of an operator or doing other damage, while at thesame time a backward movement of the shaft cannot damage the machinery,as the shaft O is then stationary.

Having thus described my invention, y

What I claim, and desire to secure by Letters Patent of the UnitedStates, is-

The head A, provided with arms E, internal ratchet f f f j, incombination with the nut M, provided with pawls J, cylindrical head F,provided,l with frictionrollers, the shafts O D, and shell B, as and forthe purpose set forth. Y

HIRAM DODGE. IVitnesses:

W. J. HosMnR, J. E. HosMnR.

